1 /* tc-mn10300.c -- Assembler code for the Matsushita 10300
3 Copyright (C) 1996 Free Software Foundation.
5 This file is part of GAS, the GNU Assembler.
7 GAS is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GAS is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GAS; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
26 #include "opcode/mn10300.h"
28 /* Structure to hold information about predefined registers. */
35 /* Generic assembler global variables which must be defined by all targets. */
37 /* Characters which always start a comment. */
38 const char comment_chars[] = "#";
40 /* Characters which start a comment at the beginning of a line. */
41 const char line_comment_chars[] = ";#";
43 /* Characters which may be used to separate multiple commands on a
45 const char line_separator_chars[] = ";";
47 /* Characters which are used to indicate an exponent in a floating
49 const char EXP_CHARS[] = "eE";
51 /* Characters which mean that a number is a floating point constant,
53 const char FLT_CHARS[] = "dD";
57 static void mn10300_insert_operand PARAMS ((unsigned long *, unsigned long *,
58 const struct mn10300_operand *,
59 offsetT, char *, unsigned,
61 static unsigned long check_operand PARAMS ((unsigned long,
62 const struct mn10300_operand *,
64 static int reg_name_search PARAMS ((const struct reg_name *, int, const char *));
65 static boolean data_register_name PARAMS ((expressionS *expressionP));
66 static boolean address_register_name PARAMS ((expressionS *expressionP));
67 static boolean other_register_name PARAMS ((expressionS *expressionP));
71 #define MAX_INSN_FIXUPS (5)
76 bfd_reloc_code_real_type reloc;
78 struct mn10300_fixup fixups[MAX_INSN_FIXUPS];
81 const char *md_shortopts = "";
82 struct option md_longopts[] = {
83 {NULL, no_argument, NULL, 0}
85 size_t md_longopts_size = sizeof(md_longopts);
87 /* The target specific pseudo-ops which we support. */
88 const pseudo_typeS md_pseudo_table[] =
93 /* Opcode hash table. */
94 static struct hash_control *mn10300_hash;
96 /* This table is sorted. Suitable for searching by a binary search. */
97 static const struct reg_name data_registers[] =
104 #define DATA_REG_NAME_CNT (sizeof(data_registers) / sizeof(struct reg_name))
106 static const struct reg_name address_registers[] =
113 #define ADDRESS_REG_NAME_CNT (sizeof(address_registers) / sizeof(struct reg_name))
115 static const struct reg_name other_registers[] =
121 #define OTHER_REG_NAME_CNT (sizeof(other_registers) / sizeof(struct reg_name))
123 /* reg_name_search does a binary search of the given register table
124 to see if "name" is a valid regiter name. Returns the register
125 number from the array on success, or -1 on failure. */
128 reg_name_search (regs, regcount, name)
129 const struct reg_name *regs;
133 int middle, low, high;
141 middle = (low + high) / 2;
142 cmp = strcasecmp (name, regs[middle].name);
148 return regs[middle].value;
155 /* Summary of register_name().
157 * in: Input_line_pointer points to 1st char of operand.
159 * out: A expressionS.
160 * The operand may have been a register: in this case, X_op == O_register,
161 * X_add_number is set to the register number, and truth is returned.
162 * Input_line_pointer->(next non-blank) char after operand, or is in
163 * its original state.
166 data_register_name (expressionP)
167 expressionS *expressionP;
174 /* Find the spelling of the operand */
175 start = name = input_line_pointer;
177 c = get_symbol_end ();
178 reg_number = reg_name_search (data_registers, DATA_REG_NAME_CNT, name);
180 /* look to see if it's in the register table */
183 expressionP->X_op = O_register;
184 expressionP->X_add_number = reg_number;
186 /* make the rest nice */
187 expressionP->X_add_symbol = NULL;
188 expressionP->X_op_symbol = NULL;
189 *input_line_pointer = c; /* put back the delimiting char */
194 /* reset the line as if we had not done anything */
195 *input_line_pointer = c; /* put back the delimiting char */
196 input_line_pointer = start; /* reset input_line pointer */
201 /* Summary of register_name().
203 * in: Input_line_pointer points to 1st char of operand.
205 * out: A expressionS.
206 * The operand may have been a register: in this case, X_op == O_register,
207 * X_add_number is set to the register number, and truth is returned.
208 * Input_line_pointer->(next non-blank) char after operand, or is in
209 * its original state.
212 address_register_name (expressionP)
213 expressionS *expressionP;
220 /* Find the spelling of the operand */
221 start = name = input_line_pointer;
223 c = get_symbol_end ();
224 reg_number = reg_name_search (address_registers, ADDRESS_REG_NAME_CNT, name);
226 /* look to see if it's in the register table */
229 expressionP->X_op = O_register;
230 expressionP->X_add_number = reg_number;
232 /* make the rest nice */
233 expressionP->X_add_symbol = NULL;
234 expressionP->X_op_symbol = NULL;
235 *input_line_pointer = c; /* put back the delimiting char */
240 /* reset the line as if we had not done anything */
241 *input_line_pointer = c; /* put back the delimiting char */
242 input_line_pointer = start; /* reset input_line pointer */
247 /* Summary of register_name().
249 * in: Input_line_pointer points to 1st char of operand.
251 * out: A expressionS.
252 * The operand may have been a register: in this case, X_op == O_register,
253 * X_add_number is set to the register number, and truth is returned.
254 * Input_line_pointer->(next non-blank) char after operand, or is in
255 * its original state.
258 other_register_name (expressionP)
259 expressionS *expressionP;
266 /* Find the spelling of the operand */
267 start = name = input_line_pointer;
269 c = get_symbol_end ();
270 reg_number = reg_name_search (other_registers, OTHER_REG_NAME_CNT, name);
272 /* look to see if it's in the register table */
275 expressionP->X_op = O_register;
276 expressionP->X_add_number = reg_number;
278 /* make the rest nice */
279 expressionP->X_add_symbol = NULL;
280 expressionP->X_op_symbol = NULL;
281 *input_line_pointer = c; /* put back the delimiting char */
286 /* reset the line as if we had not done anything */
287 *input_line_pointer = c; /* put back the delimiting char */
288 input_line_pointer = start; /* reset input_line pointer */
294 md_show_usage (stream)
297 fprintf(stream, "MN10300 options:\n\
302 md_parse_option (c, arg)
310 md_undefined_symbol (name)
317 md_atof (type, litp, sizep)
323 LITTLENUM_TYPE words[4];
339 return "bad call to md_atof";
342 t = atof_ieee (input_line_pointer, type, words);
344 input_line_pointer = t;
348 for (i = prec - 1; i >= 0; i--)
350 md_number_to_chars (litp, (valueT) words[i], 2);
359 md_convert_frag (abfd, sec, fragP)
364 /* printf ("call to md_convert_frag \n"); */
369 md_section_align (seg, addr)
373 int align = bfd_get_section_alignment (stdoutput, seg);
374 return ((addr + (1 << align) - 1) & (-1 << align));
380 char *prev_name = "";
381 register const struct mn10300_opcode *op;
383 mn10300_hash = hash_new();
385 /* Insert unique names into hash table. The MN10300 instruction set
386 has many identical opcode names that have different opcodes based
387 on the operands. This hash table then provides a quick index to
388 the first opcode with a particular name in the opcode table. */
390 op = mn10300_opcodes;
393 if (strcmp (prev_name, op->name))
395 prev_name = (char *) op->name;
396 hash_insert (mn10300_hash, op->name, (char *) op);
401 /* This is both a simplification (we don't have to write md_apply_fix)
402 and support for future optimizations (branch shortening and similar
403 stuff in the linker. */
412 struct mn10300_opcode *opcode;
413 struct mn10300_opcode *next_opcode;
414 const unsigned char *opindex_ptr;
416 unsigned long insn, extension, size = 0;
421 /* Get the opcode. */
422 for (s = str; *s != '\0' && ! isspace (*s); s++)
427 /* find the first opcode with the proper name */
428 opcode = (struct mn10300_opcode *)hash_find (mn10300_hash, str);
431 as_bad ("Unrecognized opcode: `%s'", str);
436 while (isspace (*str))
439 input_line_pointer = str;
443 const char *errmsg = NULL;
451 insn = opcode->opcode;
453 for (op_idx = 1, opindex_ptr = opcode->operands;
455 opindex_ptr++, op_idx++)
457 const struct mn10300_operand *operand;
460 if (next_opindex == 0)
462 operand = &mn10300_operands[*opindex_ptr];
466 operand = &mn10300_operands[next_opindex];
472 while (*str == ' ' || *str == ',')
475 /* Gather the operand. */
476 hold = input_line_pointer;
477 input_line_pointer = str;
479 if (operand->flags & MN10300_OPERAND_PAREN)
481 if (*input_line_pointer != ')' && *input_line_pointer != '(')
483 input_line_pointer = hold;
487 input_line_pointer++;
490 /* See if we can match the operands. */
491 else if (operand->flags & MN10300_OPERAND_DREG)
493 if (!data_register_name (&ex))
495 input_line_pointer = hold;
500 else if (operand->flags & MN10300_OPERAND_AREG)
502 if (!address_register_name (&ex))
504 input_line_pointer = hold;
509 else if (operand->flags & MN10300_OPERAND_SP)
511 char *start = input_line_pointer;
512 char c = get_symbol_end ();
514 if (strcmp (start, "sp") != 0)
516 *input_line_pointer = c;
517 input_line_pointer = hold;
521 *input_line_pointer = c;
524 else if (operand->flags & MN10300_OPERAND_PSW)
526 char *start = input_line_pointer;
527 char c = get_symbol_end ();
529 if (strcmp (start, "psw") != 0)
531 *input_line_pointer = c;
532 input_line_pointer = hold;
536 *input_line_pointer = c;
539 else if (operand->flags & MN10300_OPERAND_MDR)
541 char *start = input_line_pointer;
542 char c = get_symbol_end ();
544 if (strcmp (start, "mdr") != 0)
546 *input_line_pointer = c;
547 input_line_pointer = hold;
551 *input_line_pointer = c;
554 else if (operand->flags & MN10300_OPERAND_REG_LIST)
556 unsigned int value = 0;
557 if (*input_line_pointer != '[')
559 input_line_pointer = hold;
565 input_line_pointer++;
567 /* A null register list can not be specified. */
568 if (*input_line_pointer == ']')
570 input_line_pointer = hold;
575 while (*input_line_pointer != ']')
580 if (*input_line_pointer == ',')
581 input_line_pointer++;
583 start = input_line_pointer;
584 c = get_symbol_end ();
586 if (strcmp (start, "d2") == 0)
589 *input_line_pointer = c;
591 else if (strcmp (start, "d3") == 0)
594 *input_line_pointer = c;
596 else if (strcmp (start, "a2") == 0)
599 *input_line_pointer = c;
601 else if (strcmp (start, "a3") == 0)
604 *input_line_pointer = c;
606 else if (strcmp (start, "other") == 0)
609 *input_line_pointer = c;
613 input_line_pointer = hold;
618 input_line_pointer++;
619 mn10300_insert_operand (&insn, &extension, operand,
620 value, (char *) NULL, 0, 0);
624 else if (data_register_name (&ex))
626 input_line_pointer = hold;
630 else if (address_register_name (&ex))
632 input_line_pointer = hold;
636 else if (other_register_name (&ex))
638 input_line_pointer = hold;
642 else if (*str == ')' || *str == '(')
644 input_line_pointer = hold;
656 errmsg = "illegal operand";
659 errmsg = "missing operand";
663 & (MN10300_OPERAND_DREG | MN10300_OPERAND_AREG)) == 0)
665 input_line_pointer = hold;
670 if (opcode->format == FMT_D1 || opcode->format == FMT_S1)
672 else if (opcode->format == FMT_D2 || opcode->format == FMT_D4
673 || opcode->format == FMT_S2 || opcode->format == FMT_S4
674 || opcode->format == FMT_S6 || opcode->format == FMT_D5)
679 mn10300_insert_operand (&insn, &extension, operand,
680 ex.X_add_number, (char *) NULL,
686 /* If this operand can be promoted, and it doesn't
687 fit into the allocated bitfield for this insn,
688 then promote it (ie this opcode does not match). */
689 if (operand->flags & MN10300_OPERAND_PROMOTE
690 && ! check_operand (insn, operand, ex.X_add_number))
692 input_line_pointer = hold;
697 mn10300_insert_operand (&insn, &extension, operand,
698 ex.X_add_number, (char *) NULL,
703 /* If this operand can be promoted, then this opcode didn't
704 match since we can't know if it needed promotion! */
705 if (operand->flags & MN10300_OPERAND_PROMOTE)
707 input_line_pointer = hold;
712 /* We need to generate a fixup for this expression. */
713 if (fc >= MAX_INSN_FIXUPS)
714 as_fatal ("too many fixups");
716 fixups[fc].opindex = *opindex_ptr;
717 fixups[fc].reloc = BFD_RELOC_UNUSED;
723 str = input_line_pointer;
724 input_line_pointer = hold;
726 while (*str == ' ' || *str == ',')
731 /* Make sure we used all the operands! */
738 next_opcode = opcode + 1;
739 if (next_opcode->opcode != 0 && !strcmp(next_opcode->name, opcode->name))
741 opcode = next_opcode;
745 as_bad ("%s", errmsg);
751 while (isspace (*str))
755 as_bad ("junk at end of line: `%s'", str);
757 input_line_pointer = str;
759 /* Determine the size of the instruction. */
760 if (opcode->format == FMT_S0)
763 if (opcode->format == FMT_S1 || opcode->format == FMT_D0)
766 if (opcode->format == FMT_S2 || opcode->format == FMT_D1)
769 if (opcode->format == FMT_S4)
772 if (opcode->format == FMT_S6 || opcode->format == FMT_D5)
775 if (opcode->format == FMT_D2)
778 if (opcode->format == FMT_D4)
781 /* Write out the instruction. */
783 f = frag_more (size);
784 number_to_chars_bigendian (f, insn, size > 4 ? 4 : size);
786 number_to_chars_bigendian (f + 4, extension, size - 4);
788 /* Create any fixups. */
789 for (i = 0; i < fc; i++)
791 const struct mn10300_operand *operand;
793 operand = &mn10300_operands[fixups[i].opindex];
794 if (fixups[i].reloc != BFD_RELOC_UNUSED)
796 reloc_howto_type *reloc_howto;
801 reloc_howto = bfd_reloc_type_lookup (stdoutput, fixups[i].reloc);
806 size = bfd_get_reloc_size (reloc_howto);
808 if (size < 1 || size > 4)
812 fixP = fix_new_exp (frag_now, f - frag_now->fr_literal + offset, size,
814 reloc_howto->pc_relative,
819 int reloc, pcrel, reloc_size, offset;
821 reloc = BFD_RELOC_NONE;
822 /* How big is the reloc? Remember SPLIT relocs are
823 implicitly 32bits. */
824 if ((operand->flags & MN10300_OPERAND_SPLIT) != 0)
827 reloc_size = operand->bits;
829 /* Is the reloc pc-relative? */
830 pcrel = (operand->flags & MN10300_OPERAND_PCREL) != 0;
832 /* Gross. This disgusting hack is to make sure we
833 get the right offset for the 16/32 bit reloc in
834 "call" instructions. Basically they're a pain
835 because the reloc isn't at the end of the instruction. */
836 if ((size == 5 || size == 7)
837 && (((insn >> 24) & 0xff) == 0xcd
838 || ((insn >> 24) & 0xff) == 0xdd))
841 /* Similarly for certain bit instructions which don't
842 hav their 32bit reloc at the tail of the instruction. */
844 && (((insn >> 16) & 0xffff) == 0xfe00
845 || ((insn >> 16) & 0xffff) == 0xfe01
846 || ((insn >> 16) & 0xffff) == 0xfe02))
849 offset = size - reloc_size / 8;
851 /* Choose a proper BFD relocation type. */
855 reloc = BFD_RELOC_MN10300_32_PCREL;
857 reloc = BFD_RELOC_MN10300_16_PCREL;
858 else if (reloc_size == 32)
859 reloc = BFD_RELOC_32_PCREL;
860 else if (reloc_size == 16)
861 reloc = BFD_RELOC_16_PCREL;
862 else if (reloc_size == 8)
863 reloc = BFD_RELOC_8_PCREL;
869 if (reloc_size == 32)
870 reloc = BFD_RELOC_MN10300_32B;
871 else if (reloc_size == 16)
872 reloc = BFD_RELOC_MN10300_16B;
873 else if (reloc_size == 8)
879 /* Convert the size of the reloc into what fix_new_exp wants. */
880 reloc_size = reloc_size / 8;
883 else if (reloc_size == 16)
885 else if (reloc_size == 32)
888 fix_new_exp (frag_now, f - frag_now->fr_literal + offset, reloc_size,
889 &fixups[i].exp, pcrel,
890 ((bfd_reloc_code_real_type) reloc));
896 /* if while processing a fixup, a reloc really needs to be created */
897 /* then it is done here */
900 tc_gen_reloc (seg, fixp)
905 reloc = (arelent *) bfd_alloc_by_size_t (stdoutput, sizeof (arelent));
906 reloc->sym_ptr_ptr = &fixp->fx_addsy->bsym;
907 reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
908 reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
909 if (reloc->howto == (reloc_howto_type *) NULL)
911 as_bad_where (fixp->fx_file, fixp->fx_line,
912 "reloc %d not supported by object file format", (int)fixp->fx_r_type);
915 reloc->addend = fixp->fx_offset;
916 /* printf("tc_gen_reloc: addr=%x addend=%x\n", reloc->address, reloc->addend); */
921 md_estimate_size_before_relax (fragp, seg)
932 return fixp->fx_frag->fr_address;
934 if (fixp->fx_addsy != (symbolS *) NULL && ! S_IS_DEFINED (fixp->fx_addsy))
936 /* The symbol is undefined. Let the linker figure it out. */
939 return fixp->fx_frag->fr_address + fixp->fx_where;
944 md_apply_fix3 (fixp, valuep, seg)
949 /* We shouldn't ever get here because linkrelax is nonzero. */
955 /* Insert an operand value into an instruction. */
958 mn10300_insert_operand (insnp, extensionp, operand, val, file, line, shift)
959 unsigned long *insnp;
960 unsigned long *extensionp;
961 const struct mn10300_operand *operand;
967 /* No need to check 32bit operands for a bit. Note that
968 MN10300_OPERAND_SPLIT is an implicit 32bit operand. */
969 if (operand->bits != 32
970 && (operand->flags & MN10300_OPERAND_SPLIT) == 0)
975 if ((operand->flags & MN10300_OPERAND_SIGNED) != 0)
977 max = (1 << (operand->bits - 1)) - 1;
978 min = - (1 << (operand->bits - 1));
982 max = (1 << operand->bits) - 1;
989 if (test < (offsetT) min || test > (offsetT) max)
992 "operand out of range (%s not between %ld and %ld)";
995 sprint_value (buf, test);
996 if (file == (char *) NULL)
997 as_warn (err, buf, min, max);
999 as_warn_where (file, line, err, buf, min, max);
1003 if ((operand->flags & MN10300_OPERAND_SPLIT) != 0)
1005 *insnp |= (val >> (32 - operand->bits)) & ((1 << operand->bits) - 1);
1006 *extensionp |= ((val & ((1 << (32 - operand->bits)) - 1))
1009 else if ((operand->flags & MN10300_OPERAND_EXTENDED) == 0)
1011 *insnp |= (((long) val & ((1 << operand->bits) - 1))
1012 << (operand->shift + shift));
1014 if ((operand->flags & MN10300_OPERAND_REPEATED) != 0)
1015 *insnp |= (((long) val & ((1 << operand->bits) - 1))
1016 << (operand->shift + shift + 2));
1020 *extensionp |= (((long) val & ((1 << operand->bits) - 1))
1021 << (operand->shift + shift));
1023 if ((operand->flags & MN10300_OPERAND_REPEATED) != 0)
1024 *extensionp |= (((long) val & ((1 << operand->bits) - 1))
1025 << (operand->shift + shift + 2));
1029 static unsigned long
1030 check_operand (insn, operand, val)
1032 const struct mn10300_operand *operand;
1035 /* No need to check 32bit operands for a bit. Note that
1036 MN10300_OPERAND_SPLIT is an implicit 32bit operand. */
1037 if (operand->bits != 32
1038 && (operand->flags & MN10300_OPERAND_SPLIT) == 0)
1043 if ((operand->flags & MN10300_OPERAND_SIGNED) != 0)
1045 max = (1 << (operand->bits - 1)) - 1;
1046 min = - (1 << (operand->bits - 1));
1050 max = (1 << operand->bits) - 1;
1057 if (test < (offsetT) min || test > (offsetT) max)